TM 55-2835-208-23
GLOSSARY
Section 2.
DEFINITIONS (Continued)
TERM
DEFINITION
L
Loose
Abnormal movement of a part.
N
Nick
A s u r f a c e i m p r e s s i o n w i t h s h a rp
c o r n e r s o r
bottom,
usually caused by pressure or impact from a sharp-edged
foreign body.
T h e p a r e n t m a t e r i a l i s d i s p l a c e d b ut
usually none is separated.
P
Parent Metal
T h e b a s i c m e t a l o f a p a r t , s o m e t i m e s r e f e r r e d t o as
base metal;
the term is used particularly in connection
with welding,
w h e r e t h e p a r e n t m e t a l i s
t h a t b e i n g
welded rather than that used in welding rod.
Puncture
A hole that is pierced in a material.
R
Repair
To restore a defective part, component, subassembly or
assembly to a serviceable condition.
Rub
When one component
c o n t a c t s a n o t h e r a n d i s m o v e d in
relationship to it causing material to be removed from
i t .
D
Scoring
M u l t i p l e s c r a t c h e s , u s u a l l y p a r a l l e l a n d r e s u l t i n g f r om
the same cause.
Scratch
A long, narrow sharp-cornered impression caused by the
movement of a sharp object across the surface of parent
m a t e r i a l .
Serviceable
Equipment or parts that are in a condition which allows
t h e m t o b e r e t u r n e d t o o p e r a t i o n a l s t a t u s o n a n a i r -
c r a f t .
GLOSSARY 4
